90225731 has 8 divisors (see below), whose sum is σ = 92159760. Its totient is φ = 88312032.

The previous prime is 90225719. The next prime is 90225743. The reversal of 90225731 is 13752209.

It is an interprime number because it is at equal distance from previous prime (90225719) and next prime (90225743).

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 90225731 - 2¹⁴ = 90209347 is a prime.

It is a super-2 number, since 2×90225731² = 16281365068968722, 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 = 90225694 and 90225703.

It is not an unprimeable number, because it can be changed into a prime (90225781) 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, 4061 + ... + 14033.

It is an arithmetic number, because the mean of its divisors is an integer number (11519970).

Almost surely, 2^90225731 is an apocalyptic number.

90225731 is a deficient number, since it is larger than the sum of its proper divisors (1934029).

90225731 is a wasteful number, since it uses less digits than its factorization.

90225731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10165.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 90225731 is about 9498.7225983287. The cubic root of 90225731 is about 448.5148255517.

The spelling of 90225731 in words is "ninety million, two hundred twenty-five thousand, seven hundred thirty-one".