1551157955 has 8 divisors (see below), whose sum is σ = 1862574912. Its totient is φ = 1240136128.

The previous prime is 1551157903. The next prime is 1551157981. The reversal of 1551157955 is 5597511551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1551157955 - 2¹⁶ = 1551092419 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90074 + ... + 105903.

It is an arithmetic number, because the mean of its divisors is an integer number (232821864).

Almost surely, 2^1551157955 is an apocalyptic number.

1551157955 is a deficient number, since it is larger than the sum of its proper divisors (311416957).

1551157955 is a wasteful number, since it uses less digits than its factorization.

1551157955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197565.

The product of its digits is 196875, while the sum is 44.

The square root of 1551157955 is about 39384.7426676880. The cubic root of 1551157955 is about 1157.5826479960.

The spelling of 1551157955 in words is "one billion, five hundred fifty-one million, one hundred fifty-seven thousand, nine hundred fifty-five".