78153131 has 8 divisors (see below), whose sum is σ = 94572000. Its totient is φ = 63047808.

The previous prime is 78153113. The next prime is 78153169. The reversal of 78153131 is 13135187.

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 78153131 - 2¹⁸ = 77890987 is a prime.

It is a super-2 number, since 2×78153131² = 12215823770206322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78153094 and 78153103.

It is not an unprimeable number, because it can be changed into a prime (78153181) 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, 328256 + ... + 328493.

It is an arithmetic number, because the mean of its divisors is an integer number (11821500).

Almost surely, 2^78153131 is an apocalyptic number.

78153131 is a deficient number, since it is larger than the sum of its proper divisors (16418869).

78153131 is a wasteful number, since it uses less digits than its factorization.

78153131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656773.

The product of its digits is 2520, while the sum is 29.

The square root of 78153131 is about 8840.4259512763. The cubic root of 78153131 is about 427.5452907341.

The spelling of 78153131 in words is "seventy-eight million, one hundred fifty-three thousand, one hundred thirty-one".