155961345 has 8 divisors (see below), whose sum is σ = 249538176. Its totient is φ = 83179376.

The previous prime is 155961343. The next prime is 155961347. The reversal of 155961345 is 543169551.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (155961343) and next prime (155961347).

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 155961345 - 2¹ = 155961343 is a prime.

It is a super-2 number, since 2×155961345² = 48647882268418050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155961343) 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, 5198697 + ... + 5198726.

It is an arithmetic number, because the mean of its divisors is an integer number (31192272).

Almost surely, 2^155961345 is an apocalyptic number.

155961345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155961345 is a deficient number, since it is larger than the sum of its proper divisors (93576831).

155961345 is a wasteful number, since it uses less digits than its factorization.

155961345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10397431.

The product of its digits is 81000, while the sum is 39.

The square root of 155961345 is about 12488.4484624792. The cubic root of 155961345 is about 538.2767942700.

The spelling of 155961345 in words is "one hundred fifty-five million, nine hundred sixty-one thousand, three hundred forty-five".