151561557 has 48 divisors (see below), whose sum is σ = 263841600. Its totient is φ = 85730400.

The previous prime is 151561547. The next prime is 151561561. The reversal of 151561557 is 755165151.

It is a happy number.

151561557 is a `hidden beast` number, since 1 + 51 + 56 + 1 + 557 = 666.

It is not a de Polignac number, because 151561557 - 2⁶ = 151561493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151561507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 143682 + ... + 144732.

It is an arithmetic number, because the mean of its divisors is an integer number (5496700).

Almost surely, 2^151561557 is an apocalyptic number.

It is an amenable number.

151561557 is a deficient number, since it is larger than the sum of its proper divisors (112280043).

151561557 is a wasteful number, since it uses less digits than its factorization.

151561557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183 (or 1170 counting only the distinct ones).

The product of its digits is 26250, while the sum is 36.

The square root of 151561557 is about 12311.0339533282. The cubic root of 151561557 is about 533.1667031098.

The spelling of 151561557 in words is "one hundred fifty-one million, five hundred sixty-one thousand, five hundred fifty-seven".