155447457 has 16 divisors (see below), whose sum is σ = 227251200. Its totient is φ = 93733200.

The previous prime is 155447443. The next prime is 155447483. The reversal of 155447457 is 754744551.

It is not a de Polignac number, because 155447457 - 2¹⁸ = 155185313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155447057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5269 + ... + 18402.

It is an arithmetic number, because the mean of its divisors is an integer number (14203200).

Almost surely, 2^155447457 is an apocalyptic number.

It is an amenable number.

155447457 is a deficient number, since it is larger than the sum of its proper divisors (71803743).

155447457 is a wasteful number, since it uses less digits than its factorization.

155447457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23884.

The product of its digits is 392000, while the sum is 42.

The square root of 155447457 is about 12467.8569529811. The cubic root of 155447457 is about 537.6849417307.

The spelling of 155447457 in words is "one hundred fifty-five million, four hundred forty-seven thousand, four hundred fifty-seven".