1156455531 has 48 divisors (see below), whose sum is σ = 2093764608. Its totient is φ = 597542400.

The previous prime is 1156455493. The next prime is 1156455551. The reversal of 1156455531 is 1355546511.

1156455531 is a `hidden beast` number, since 1 + 1 + 5 + 645 + 5 + 5 + 3 + 1 = 666.

1156455531 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1156455531 - 2¹³ = 1156447339 is a prime.

It is a super-2 number, since 2×1156455531² = 2674778790360983922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1156455551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 127995 + ... + 136731.

It is an arithmetic number, because the mean of its divisors is an integer number (43620096).

Almost surely, 2^1156455531 is an apocalyptic number.

1156455531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1156455531 is a deficient number, since it is larger than the sum of its proper divisors (937309077).

1156455531 is a wasteful number, since it uses less digits than its factorization.

1156455531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8952 (or 8949 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

The square root of 1156455531 is about 34006.6983254770. The cubic root of 1156455531 is about 1049.6462999146.

The spelling of 1156455531 in words is "one billion, one hundred fifty-six million, four hundred fifty-five thousand, five hundred thirty-one".