56121151 has 2 divisors, whose sum is σ = 56121152. Its totient is φ = 56121150.

The previous prime is 56121137. The next prime is 56121161. The reversal of 56121151 is 15112165.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56121151 - 2⁹ = 56120639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56121101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28060575 + 28060576.

It is an arithmetic number, because the mean of its divisors is an integer number (28060576).

Almost surely, 2^56121151 is an apocalyptic number.

56121151 is a deficient number, since it is larger than the sum of its proper divisors (1).

56121151 is an equidigital number, since it uses as much as digits as its factorization.

56121151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 300, while the sum is 22.

The square root of 56121151 is about 7491.4051418943. The cubic root of 56121151 is about 382.8619348881.

It can be divided in two parts, 561 and 21151, that added together give a palindrome (21712).

The spelling of 56121151 in words is "fifty-six million, one hundred twenty-one thousand, one hundred fifty-one".