155402253 has 16 divisors (see below), whose sum is σ = 243768960. Its totient is φ = 97507008.

The previous prime is 155402231. The next prime is 155402297. The reversal of 155402253 is 352204551.

It is a happy number.

155402253 is a `hidden beast` number, since 1 + 5 + 5 + 402 + 253 = 666.

It is not a de Polignac number, because 155402253 - 2¹³ = 155394061 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155412253) 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, 168825 + ... + 169742.

It is an arithmetic number, because the mean of its divisors is an integer number (15235560).

Almost surely, 2^155402253 is an apocalyptic number.

It is an amenable number.

155402253 is a deficient number, since it is larger than the sum of its proper divisors (88366707).

155402253 is a wasteful number, since it uses less digits than its factorization.

155402253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338593 (or 338587 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 155402253 is about 12466.0439996015. The cubic root of 155402253 is about 537.6328172230.

The spelling of 155402253 in words is "one hundred fifty-five million, four hundred two thousand, two hundred fifty-three".