1025511431 has 4 divisors (see below), whose sum is σ = 1172013072. Its totient is φ = 879009792.

The previous prime is 1025511379. The next prime is 1025511437. The reversal of 1025511431 is 1341155201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1025511431 - 2¹⁴ = 1025495047 is a prime.

It is a super-2 number, since 2×1025511431² = 2103347390223335522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1025511397 and 1025511406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025511437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73250810 + ... + 73250823.

It is an arithmetic number, because the mean of its divisors is an integer number (293003268).

Almost surely, 2^1025511431 is an apocalyptic number.

1025511431 is a deficient number, since it is larger than the sum of its proper divisors (146501641).

1025511431 is an equidigital number, since it uses as much as digits as its factorization.

1025511431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146501640.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1025511431 is about 32023.6074014156. The cubic root of 1025511431 is about 1008.4325033503.

Adding to 1025511431 its reverse (1341155201), we get a palindrome (2366666632).

The spelling of 1025511431 in words is "one billion, twenty-five million, five hundred eleven thousand, four hundred thirty-one".