155261513 has 12 divisors (see below), whose sum is σ = 171065664. Its totient is φ = 140811000.

The previous prime is 155261501. The next prime is 155261537. The reversal of 155261513 is 315162551.

It is not a de Polignac number, because 155261513 - 2¹⁰ = 155260489 is a prime.

It is a super-2 number, since 2×155261513² = 48212274838098338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155260513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59588 + ... + 62138.

It is an arithmetic number, because the mean of its divisors is an integer number (14255472).

Almost surely, 2^155261513 is an apocalyptic number.

It is an amenable number.

155261513 is a deficient number, since it is larger than the sum of its proper divisors (15804151).

155261513 is a wasteful number, since it uses less digits than its factorization.

155261513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3076 (or 3065 counting only the distinct ones).

The product of its digits is 4500, while the sum is 29.

The square root of 155261513 is about 12460.3977865877. The cubic root of 155261513 is about 537.4704658732.

The spelling of 155261513 in words is "one hundred fifty-five million, two hundred sixty-one thousand, five hundred thirteen".