56151397 has 2 divisors, whose sum is σ = 56151398. Its totient is φ = 56151396.

The previous prime is 56151379. The next prime is 56151419. The reversal of 56151397 is 79315165.

Together with previous prime (56151379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36072036 + 20079361 = 6006^2 + 4481^2 .

It is a cyclic number.

It is not a de Polignac number, because 56151397 - 2⁷ = 56151269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56151317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28075698 + 28075699.

It is an arithmetic number, because the mean of its divisors is an integer number (28075699).

Almost surely, 2^56151397 is an apocalyptic number.

It is an amenable number.

56151397 is a deficient number, since it is larger than the sum of its proper divisors (1).

56151397 is an equidigital number, since it uses as much as digits as its factorization.

56151397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28350, while the sum is 37.

The square root of 56151397 is about 7493.4235833830. The cubic root of 56151397 is about 382.9307025582.

The spelling of 56151397 in words is "fifty-six million, one hundred fifty-one thousand, three hundred ninety-seven".