155253857 has 8 divisors (see below), whose sum is σ = 171013440. Its totient is φ = 139768560.

The previous prime is 155253853. The next prime is 155253871. The reversal of 155253857 is 758352551.

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 155253857 - 2² = 155253853 is a prime.

It is a super-2 number, since 2×155253857² = 48207520226752898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155253853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67382 + ... + 69647.

It is an arithmetic number, because the mean of its divisors is an integer number (21376680).

Almost surely, 2^155253857 is an apocalyptic number.

It is an amenable number.

155253857 is a deficient number, since it is larger than the sum of its proper divisors (15759583).

155253857 is a wasteful number, since it uses less digits than its factorization.

155253857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137143.

The product of its digits is 210000, while the sum is 41.

The square root of 155253857 is about 12460.0905694943. The cubic root of 155253857 is about 537.4616314418.

The spelling of 155253857 in words is "one hundred fifty-five million, two hundred fifty-three thousand, eight hundred fifty-seven".